Top 20 Strapping Seal Manufacturers: Who Is Best for Which Joint?

The best strapping seal manufacturers include Signode for established tool families, Krishca for detailed steel-seal specifications, and Leicatex for serrated closure options. This guide compares 20 producers by the seals they make, their published production capabilities and the orders they suit. Start with the strap and joining tool: a familiar company name or matching nominal width can’t establish compatibility.

Disclosure: This guide is published by UD Packaging, a supplier of PET strapping, strapping seals, buckles and supporting equipment. This report provides comparison information for the top 20 industrial strap-seal manufacturers. UD Packaging is not included in the manufacturer ranking because its current public information does not establish in-house strapping-seal production. The 20 companies below were selected based on publicly verifiable seal-manufacturing capability.

How We Selected These Strapping Seal Manufacturers

Selection began with more than 30 candidates, then narrowed to companies with explicit evidence of consumable industrial strapping-seal manufacture. Company websites, including product and factory pages, and publicly available company documents and records, were reviewed. Information was compared with manufacturer web pages and other trusted sources, in September 2026.

Admission required more than a strapping catalogue. A producer’s own seal-manufacturing statement, identified press shop, forming process or production certificate helped establish its place. Distributors, marketplaces, buckle-only businesses and equipment suppliers without seal-production evidence were excluded. Group relationships also matter: MPS appears within Signode’s entry, and TITAN within P.W. Lenzen’s, so related operations don’t occupy extra places.

When comparing manufacturers, we considered the seal type, the manufacturing method, the width of the seal, the thickness, and the published quality controls. We considered the different industries in which these sealing systems will be used, as well as the service provided by the manufacturer. “Best for” represents our opinion as to the suitability of the product for a given application. The numbers are for the reader’s convenience. The numbered order doesn’t establish conclusions regarding comparative product quality. A given manufacturer may provide products for different applications, but may not provide a seal that’s suitable for a given application.

A strapping seal is the closure formed around a strap, and a sealer is a means to effect such closure. Buckles are closure elements through which straps may be threaded or looped. Strapping seals may be made of various materials, and ‘plastic’ strapping seals may be of metal. In the term ‘plastic strapping seal’, ‘plastic’ denotes the type of strap for which the closure is required.

Strapping Seal Manufacturers at a Glance

Strapping Seal Manufacturer Comparison: Closure Types and Application Fit has short-listed a selected group of companies and provides a business reference for closure purchase. Historical information is included to clarify when the company or its group began, with name changes or acquisitions distinguished where relevant. The information is provided at the entity level.

Capacity information is published by a company to express the extent of its production facilities. Such information may not represent the stock of materials that a company may have available for sale. Information is included to assist the customer in assessing the reason a company may be of interest.

Integrated Manufacturers of Steel Strapping Seals and Strapping Systems

These companies manufacture seals and other related consumables.

1. Signode: Best for matching proprietary seal families to Signode tools

Signode connects its seal range to named tool families, which makes it a useful starting point when a plant already operates Signode strapping systems. The group’s seal-manufacturing evidence includes MPS, its Turkish joint venture, whose product page describes producing steel seals with Signode technology. Microgrip adds internal grit for waxed steel strap, while Nestack is intended for specified magazine-fed applications. Buyers maintaining an established tool fleet can therefore start with the existing machine and seal code instead of choosing a closure by width alone.

• Headquarters / location: Tampa, Florida, USA. Founded: 1913.
• Company type: Industrial strapping-system manufacturer; MPS joint venture counted within this entry.
• Main seals: Snap-on, thread-on, open-flange, push-type, Microgrip and Nestack seals.
• Published capability: Group-related MPS explicitly manufactures steel seals; Signode publishes exact seal and tool family applications.
• Purchasing consideration: Nestack availability differs by region.
• Official website: www.signode.com

2. P.W. Lenzen / TITAN: Best for German production with a documented seal-manufacturing certificate scope

P.W. Lenzen provides unusually direct production evidence through its Iserlohn quality certificate, whose scope includes steel strapping, seals and PET strap. The wider Lenzen Group traces its history to a cooperage founded in 1842 and now presents its product range under TITAN. Its group address is in Schwelm; Iserlohn is the identified P.W. Lenzen production site. This combination suits purchasing teams that need to connect the supplier, manufacturing location and management-system documentation in the same qualification file.

• Headquarters / location: Schwelm, Germany (group); Iserlohn production site. Founded: 1842.
• Company type: Strapping consumables producer within the Lenzen Group.
• Main seals: Steel strapping seals and matching strapping-system consumables.
• Published capability: Iserlohn scope expressly includes production and sale of steel strapping, seals and PET strap.
• Quality documentation: ISO 9001:2015 certificate for Iserlohn; stated validity through 11 March 2027.
• Purchasing consideration: The published seal range centres on steel-strapping systems.
• Official website: www.lenzen-gruppe.de

3. Maillis: Best for push-type steel seals for single- and double-notch tools

Maillis makes steel strapping systems and publishes a seal range for both single-notch and double-notch joints. Its push-type products include USLM variants with or without internal grit, alongside galvanized, painted and printed finishes. Those distinctions are useful when the packaging station already has a particular notch-forming tool and the buyer needs a matching replacement consumable. The published range is centred on steel strap, so a PET closure enquiry should begin with a different product family rather than a visually similar Maillis steel seal.

• Headquarters / location: Inofyta, Greece. Founded: Not publicly disclosed.
• Company type: Steel strapping-system manufacturer.
• Main seals: Push-type steel seals; galvanized, painted, printed and grit options.
• Published capability: Manufactures a steel strapping system completed with seals for single- or double-notch tools.
• Purchasing consideration: This published range focuses on steel-strap systems.
• Official website: www.maillis.com

4. Krishca Strapping Solutions: Best for steel seals with published joint types and dimensional tolerances

Krishca describes a dedicated press shop that converts cold-rolled steel sheets into strapping seals. Its specification tables separate joint type, seal length, thickness and strap size, giving engineers more to work with than a single nominal-width description. The business was established in 2017, and its Chennai-area operation began commercial production in 2020. For steel mills or other users retaining mechanical notch joints, the published tables make an initial drawing review practical before the factory prepares sample joints.

• Headquarters / location: Mappedu, Tamil Nadu, India. Founded: 2017.
• Company type: Steel strapping and seal manufacturer.
• Main seals: Open, push-type, thread-on, open-flange and Nestack seals.
• Published capability: Own press shop forms seals from cold-rolled steel sheets.
• Purchasing consideration: Published seal tables are for steel strapping.
• Official website: www.krishcastrapping.com

5. JUHONG Packing Materials: Best for steel, PET and PP seal procurement from an integrated producer

JUHONG Packing Materials combines strap production with a stated seal process that runs through slitting, feeding, stamping, forming and automatic counting. The Changzhou business dates to 1997, and its website reports annual production capacity of 300 million steel seals. Its catalogue spans steel and plastic strapping applications, making it relevant to importers consolidating several closure families with one industrial packaging producer. Its serrated-seal page lists 13, 16 and 19 mm widths, with customization offered for other sizes.

• Headquarters / location: Changzhou, Jiangsu, China. Founded: 1997.
• Company type: Integrated industrial packaging-materials manufacturer.
• Main seals: Serrated, push-type, snap-on, thread-on, open-flange and magazine seals.
• Published capability: Published seal process includes slitting, feeding, stamping, forming and automatic counting.
• Quality documentation: Website offers seal-specific SGS documentation and other reports where applicable, subject to selected product.
• Purchasing consideration: Standard serrated-seal widths are 13, 16 and 19 mm; other sizes require customization.
• Official website: www.jsjhpackaging.com

Steel Seals and Specialty Metal Strapping Closures

Specialist banding seal manufacturers often publish useful details about pressing, finishing, custom marking or order sizes. This group includes North American and European producers plus Fechometal’s Brazil and US operations, whose alloy-specific range serves a different type of fastening enquiry.

6. Rhino Strapping Products: Best for US banding seals with in-house rolling, slitting and stamping

Rhino’s factory description gives a clear view of the work behind its banding seals: domestic steel coils pass through rolling and slitting before stamping. The Taylor, Michigan manufacturer, founded in 1977, identifies a Bliss rolling mill and Ruesch slitter as part of that process. In-house tooling and stamping make the company relevant to buyers who want to discuss the formed-metal component with its producer. For combined seal-and-strap purchases, its own strapping line covers regular-duty steel.

• Headquarters / location: Taylor, Michigan, USA. Founded: 1977.
• Company type: Banding-seal, buckle and regular-duty strap manufacturer.
• Main seals: Banding seals and regular-duty steel strapping.
• Published capability: Bliss rolling mill, Ruesch slitter and in-house stamping/tooling.
• Purchasing consideration: For seal-and-strap bundles, its integrated strapping line is regular-duty steel.
• Official website: rhinostrappingproducts.com

7. Independent Metal Strap: Best for US-made galvanized and stainless steel closure systems

Independent Metal Strap describes production at its Dover plant using domestic steel, including in-house galvanization. Its published range covers open, push-type, semi-open, closed and stainless steel seals, alongside the corresponding steel banding products. The company traces its history to 1907 and gives buyers a domestic manufacturing option for galvanized or stainless closure systems. Its strength for this comparison is the stated metal-processing route and steel-focused range; the product family is less directly suited to a buyer seeking a broad PP closure catalogue.

• Headquarters / location: Not publicly disclosed; production is identified in Dover, New Jersey, USA. Founded: 1907.
• Company type: Steel strapping and seal manufacturer.
• Main seals: Open, push-type, semi-open, closed and stainless steel seals.
• Published capability: Dover plant uses domestic steel and performs production, including galvanization, in house.
• Purchasing consideration: Its published seal range centres on steel strapping.
• Official website: indmetalstrap.com

8. McLean Manufacturing: Best for direct factory orders from one box to truckload quantities

McLean Manufacturing makes its seals in Lake Barrington, Illinois, and traces its origin to Chicago in 1939. It supplies steel and plastic strapping closures and accepts both single-box direct orders and full-truckload purchases. The range includes familiar snap-on and thread-on styles as well as wing and 2-inch seals, which gives maintenance buyers and volume purchasing teams different starting points within one factory catalogue. Galvanized is the standard finish, with other finishes handled through a separate request.

• Headquarters / location: Lake Barrington, Illinois, USA. Founded: 1939.
• Company type: Steel and plastic strapping-seal manufacturer.
• Main seals: Snap-on, pusher, thread-on, semi-open, wing and 2-inch seals.
• Published capability: All seals made at the Lake Barrington facility; galvanized standard finish.
• Purchasing consideration: Non-galvanized finishes require a separate request.
• Official website: www.mcleanmfg.com

9. Kippes: Best for unusual seal profiles, materials and printed identification

Kippes is a German seal specialist whose catalogue extends well beyond a few common steel-band sizes. According to its website, the Cologne business offers approximately 400 seal varieties and can apply two-colour printing, with materials that include V2A stainless steel, copper and brass. Its history dates to 1924, followed by seal and tool production using its own machinery. That combination is useful for a buyer specifying an unusual formed closure or visible identification mark rather than simply replenishing a standard box of commodity seals.

• Headquarters / location: Cologne, Germany. Founded: 1924.
• Company type: German steel and plastic strapping-seal specialist.
• Main seals: Steel/plastic strap seals, including special copper and brass designs.
• Published capability: Own seal production with approximately 400 varieties and two-colour printing.
• Purchasing consideration: Special materials require a defined drawing and tooling match.
• Official website: kippes-gmbh.de

10. PW Sealtech: Best for UK factory-direct steel banding seals

PW Sealtech manufactures seals and buckles in the UK, with PW Packaging Seals identified in its company profile as the trading arm serving wholesalers and end users. The published factory description covers power presses, raw-material supply and processing, packing and shipping from one site. Its legal entity was incorporated in 1998 and has a registered office in Walsall, although the factory history described by the company is longer. The combination of steel and plastic strapping seals is relevant to distributors seeking directly produced consumables across several manual packaging applications.

• Headquarters / location: Walsall, United Kingdom (registered office). Founded: 1998.
• Company type: UK seal manufacturer; PW Packaging Seals is its trading arm.
• Main seals: Steel banding seals and seals for plastic strapping.
• Published capability: Company profile describes power-press production, processing and packing at one site.
• Purchasing consideration: The direct website currently lacks an online product catalogue.
• Official website: pwpackagingseals.com

11. Venture Steel Group: Best for own-brand galvanized seals with custom labelling and barcodes

Venture Steel Group forms galvanized steel strapping seals on Heenan bathtub-style presses at its Cradley Heath operation. The published range includes lap-over, semi-open and snap-on profiles for 12–25 mm band widths, together with own-brand labels and barcodes. According to the company, monthly seal capacity can reach 4 million pieces. Those packing options give industrial distributors a concrete reason to consider Venture when they need repeat stock under their own label, while the published width range sets an initial boundary on the enquiry.

• Headquarters / location: Cradley Heath, United Kingdom. Founded: 2003.
• Company type: UK steel presswork and strapping-seal manufacturer.
• Main seals: Lap-over, semi-open and snap-on galvanized steel seals.
• Published capability: Galvanized coil formed on Heenan bathtub-style presses.
• Purchasing consideration: Published band-width coverage is 12–25 mm.
• Official website: www.venturesteelgroup.com

12. Toolco: Best for separate PP, PET and dual-material seal families

Toolco separates its metal seals into PP, PET and combined PP/PET families, so the product table provides a useful first filter by strap material. The M-series serves polypropylene strapping, while PET13 and PET16 are listed for polyester strap and include a porous internal gripping surface. Its company history starts in 1985, with Polish operations and a packaging division added later. This is a practical catalogue for buyers standardizing several manual packing stations, provided they preserve the distinct material and product-code selections instead of treating every metal clip as interchangeable.

• Headquarters / location: Bialystok, Poland. Founded: 1985.
• Company type: Metal packaging-accessory manufacturer.
• Main seals: M-series PP seals, PET13/PET16 seals and PP/PET metal seals.
• Published capability: Formed-metal packaging production with product-specific material and packing tables.
• Purchasing consideration: Listed PET seal sizes are limited to 13 and 16 mm.
• Official website: www.toolcoaccessories.com

13. Leicatex: Best for herringbone serrated seals with printed or embossed branding

Leicatex manufactures strapping fasteners at its London, Ontario factory and dates the business to 1973. Its catalogue describes a herringbone serration pattern and separates open, snap-on, semi-open and magazine products by seal code. Logo printing and embossing add an identification option for distributors or plants that want the closure to carry a recognizable mark. For packaging solutions using serrated plastic-strapping seals, the catalogue lists 13, 16 and 19 mm strap sizes.

• Headquarters / location: London, Ontario, Canada. Founded: 1973.
• Company type: Strapping fastener and seal manufacturer.
• Main seals: Serrated open, snap-on, semi-open and magazine seals.
• Published capability: London factory produces seals and offers logo printing or embossing.
• Quality documentation: Website describes the manufacturer as ISO certified without a seal-product certification claim.
• Purchasing consideration: Listed serrated plastic-strapping seals cover 13, 16 and 19 mm strap.
• Official website: www.leicatex.de

14. Champion Strapping: Best for US steel-seal ordering by detailed part-number tables

Champion Strapping publishes detailed ordering tables for regular-duty and heavy-duty steel seals, including open, push-type and thread-on designs. Its Canal Winchester, Ohio operation also offers private labelling and packing options, which can simplify replenishment when a buyer already has a known seal part number. Mainline Metals announced its acquisition of Champion in September 2025 and described a new 60,000-square-foot facility.

• Headquarters / location: Canal Winchester, Ohio, USA. Founded: Not publicly disclosed.
• Company type: Seal and strapping producer owned by Mainline Metals.
• Main seals: Regular- and heavy-duty open, push-type and thread-on seals.
• Published capability: US seal manufacture with custom private labelling and packing options.
• Purchasing consideration: Published seal tables centre on steel strapping.
• Official website: championstrapping.com

15. JEM Strapping Systems: Best for Canadian steel-strapping and seal sourcing with tool support

JEM Strapping Systems identifies itself as a Canadian manufacturer of steel strapping and seals as well as a supplier of wider packaging products. Its founder’s public testimony places the business in Brantford, Ontario, with a 1997 start, and distinguishes manufactured steel products from purchased nonmetallic strap. Tool repair adds a useful service connection for plants sourcing consumables around an existing packaging operation. Because the wider catalogue contains sourced products too, a selected seal’s production origin belongs on the order specification rather than being inferred for every item bearing the supplier’s name.

• Headquarters / location: Brantford, Ontario, Canada. Founded: 1997.
• Company type: Canadian steel strapping and seal manufacturer and distributor.
• Main seals: Steel and plastic strapping seals; related cargo-control supplies.
• Published capability: Official About page expressly identifies strapping-seal manufacture; tool repair also offered.
• Purchasing consideration: The wider catalogue includes sourced products; clarify the selected seal origin.
• Official website: www.jemline.com

16. Fechometal: Best for alloy-specific overlap seals for round steel-band applications

Fechometal brings a different product emphasis to the list: overlap seals for steel banding on round surfaces, used with its pneumatic tool. The published material choices include 201, 304 and 316 stainless steel, Alloy 625 and 400, Titanium Grade 2 and Duplex 2507. The Brazilian group was founded in 1998 and has operations in Brazil and the United States, including Sanford, Florida. This makes it a relevant enquiry for an alloy-specific fastening system, although material selection still has to follow the actual exposure and the specified tool arrangement.

• Headquarters / location: Rio de Janeiro, Brazil; US operation in Sanford, Florida. Founded: 1998.
• Company type: Metal fastening-product manufacturer with Brazil and US operations.
• Main seals: Steel-band overlap seals in stainless grades and specialty alloys.
• Published capability: Lists 201/304/316 stainless, Alloy 625/400, Titanium Grade 2 and Duplex 2507 options.
• Purchasing consideration: Specialty seals are specified around Fechometal pneumatic tooling.
• Official website: fechometal.com

Asian Manufacturers of Plastic Strapping Seals and Steel Closures

The following companies produce metal closures and seals for strapping applications.

17. Asia Metal Works Industry: Best for custom stamped seals with in-house die design

Asia Metal Works Industry describes its own metal stamping, die making and seal production in Samut Sakhon, Thailand. Founded in 1990, it markets SAMSON and KIBS products and lists serrated, pushed, closed, open, intersection, magazine and wing seals. Custom-size manufacture and tensile-test reports on request make the company relevant when a standard distributor listing doesn’t match the required formed part. Its range of strapping materials and tools broadens the purchasing offer. Its magazine-seal listing covers 19 and 32 mm steel strap, while separate designs serve PET and PP.

• Headquarters / location: Samut Sakhon, Thailand. Founded: 1990.
• Company type: Metal stamping and strapping-seal manufacturer.
• Main seals: Serrated, pushed, closed, open, intersection, magazine and wing seals.
• Published capability: In-house die making and custom-size seal manufacturing; SAMSON and KIBS brands.
• Quality documentation: Website lists ISO 9001:2015 management certification.
• Purchasing consideration: Published magazine seals cover 19 and 32 mm steel strap.
• Official website: www.asmw.co.th

18. Rozee Technist: Best for PET gripper seals from an Indian packing-clip producer

Rozee Technist, established in 1999 in Rajkot, describes manufacturing packing clips alongside its importing and wholesale activities. The published seal range separately identifies PET strap gripper seals and 32 mm steel strapping seals, giving buyers a clearer product split than a generic metal-clip listing. Its stated willingness to work to customer specifications is relevant to a PET closure enquiry with an existing sample or drawing. Price listings use bag units, so quantity and dimensions need to stay attached to the offer when procurement compares suppliers.

• Headquarters / location: Rajkot, Gujarat, India. Founded: 1999.
• Company type: Packing-clip and strapping-seal manufacturer, also importer and wholesaler.
• Main seals: PET gripper seals, PET strap clips and steel strapping seals.
• Published capability: Manufactures packing clips and offers specifications to customer requirements.
• Purchasing consideration: Bag prices can’t be compared without count and seal specifications.
• Official website: www.rozeetechnist.com

19. Shaoxing Dingli New Material Technology: Best for steel-seal volume sourcing with stated inspection capability

Shaoxing Dingli New Material Technology publishes a steel strapping and seal manufacturing operation dating to 2010. The company states annual capacity above 100 million seals and describes incoming, process and final inspection, with universal tensile and salt-spray test equipment. Its catalogue covers several closure profiles and logo-marked options, which makes it relevant to volume buyers seeking both product variety and documented inspection discussions. Its closed-seal product page specifies steel strapping and lists Q195, Q235 and Q345 materials.

• Headquarters / location: Shaoxing, Zhejiang, China. Founded: 2010.
• Company type: Steel strapping and seal producer.
• Main seals: Closed, semi-open, open, snap-on, PET and logo-marked seals.
• Published capability: States annual capacity above 100 million seals plus incoming, process and final inspection.
• Quality documentation: Website lists ISO 9001, ISO 14001 and ISO 45001 management certifications.
• Purchasing consideration: The published closed-seal range is for steel strapping.
• Official website: www.dlstrap.com

20. Maruti Packaging Industries: Best for open-type steel seals with identified 12C, 58C and 34C equivalents

Maruti Packaging Industries explicitly describes manufacturing steel strapping seals and lists open-type equivalents including 12C, 58C and 34C. Its company information places the business in Delhi with a 2014 start, while the seal page identifies an MP-04 product listing. Those named forms offer a starting point for a replacement-part enquiry when a buyer has an existing open seal to compare. The page mixes stainless and galvanized material descriptions, so the purchase drawing should name the required metal and finish rather than treating that wording as a single specification.

• Headquarters / location: Delhi, India. Founded: 2014.
• Company type: Industrial steel-strapping-seal manufacturer and packaging supplier.
• Main seals: Open-type steel strap seals; MP-04 listing.
• Published capability: Expressly describes manufacturing steel seals in varied dimensions.
• Purchasing consideration: Its seal page mixes stainless and galvanized descriptions; specify exact metallurgy.
• Official website: www.marutipackaging.com

How to Choose a Strapping Seal Manufacturer for Steel, PET and PP Strapping

Choose a manufacturer of strapping seals based on the closure, strap, tools and joint performance you need. Compare commercial terms only after analysis. When overlapping strap ends are joined, the way the tool forms the seal helps define whether the joint is usable. A cheap strapping seal doesn’t benefit the company’s packing process if its joints aren’t allowable.

1. Define the strap material and dimensions first

List the type of PET, PP, or steel (regular or high tensile), the width and thickness of strap, and the supplier’s info on grade and surface condition. When ordering closure components, don’t use the term “Poly strap” as different seal geometries exist for polyester and polypropylene strap.

When specifying the seal, use separate fields for the different dimensions. A strap thickness that’s acceptably formed may be different from the thickness of the metal seal. The seal may not fit the forming tools or may not permit the desired strap overlap. For polyester closure systems, use the PET strapping specification to give the strap requirements to the closure manufacturer. Never approve a substitute solely because both boxes say 16 mm.

2. Match seals to strapping tools, manual sealers and machines

Identify the sealer and tensioner model, type of jaw or die, and design of notch or crimp. Different types and sizes of closures may be required for manual sealers, combination tools and pneumatic sealers. There are various shapes and forms of seals, including open or snap-on seals, closed seals, thread-on seals, open flange seals and push-type seals. They’re named according to their form or method of application. Names don’t denote a seal’s compatibility with a tool.

Magazine seals are used in designated strapping machines and therefore must be coordinated with the equipment to meet the requirements of size and feed. Manual tools and automatic strapping tools are different kinds of strapping equipment and can require different kinds of consumables. A seal intended for hand placement in a strapping tool may not feed through an automated strapping station. A seal with a serrated surface isn’t automatically suitable for PET, and the surface doesn’t establish that it’s stronger than other seals. A picture of the tool along with the name plate must be sent. It’s also requested to submit a drawing illustrating the complete system, with the current joint photograph and tool nameplate.

3. Request joint results for the actual strap, seal, tool combination

The breaking force of a strap joint isn’t established by the breaking force of its individual components. The tensile strength of the strap material doesn’t establish the load capacity of the completed joint. State the grade and dimensions of the strap, the seal used, the type and size of the tool used, the method of specimen preparation and where failure occurred. There are different possible outcomes, e.g. strap slippage, strap rupture and seal opening. Joint efficiency can’t be taken as acceptance of the joint without the comparison and test conditions.

For carbon-steel strapping and seals, the current published specification is ASTM D3953-15(2022); its scope excludes specialty-type and alloy-metal strapping. ASTM D3950-23 addresses nonmetallic strapping and joining methods. Neither reference means a seal is “ASTM certified.” Use the applicable specification and edition in the test request, and keep a management-system certificate separate from product performance.

Securing heavy loads, including steel beams and industrial bundles, also requires consideration of the package and handling route. ASTM D4675-14a(2022) provides selection guidance and identifies user testing as necessary. A joint test is one input; it does not by itself establish the number of straps, protection at edges or a transport loading arrangement.

4. Specify metal, coating and storage exposure

Distinguish base metal from finish. Closure surface requirements (if any) depend on the application. High resistance or strength and durability can be stated for a closure but what property or test defines that? A closure made from galvanized carbon steel can rust. Likewise, a closure made from a painted or a rust-resistant stainless steel grade can also rust. Discuss the environment to which the closure is exposed. Also, document the requirements of special alloys.

The condition of the coating after forming should be evaluated. Coating defects may adversely affect the function of the package or the strap. For a given environment, corrosion may be accelerated by a number of test methods and conditions. A test-chamber result doesn’t establish service life; record the corrosion test method, duration and acceptance criterion. Consider storage and transportation conditions to ensure that seals are fit for use upon arrival at the work station.

5. Agree incoming checks and lot identification

Agreement must be reached to identify the critical dimensions to be controlled. The revision of the drawing to be referenced must also be defined. Review incoming closures for conformance to specified dimensions and other requirements, and assess the closures’ fitness for use. Establish adequate acceptance criteria to evaluate the closures and ensure personnel in the purchasing, production and quality assurance departments reach a concurrent conclusion.

Lot labels allow delivery records to be tied to inspection and test records. What’s the supplier’s process when the press tool, the raw material source, or the finish of the part changes? What’s the supplier’s traceability process, and how is affected stock identified? Traceability helps in reducing downtime and is used to isolate questioned lots.

6. Separate minimum orders, custom tooling and replenishment terms

A reference catalog showing standard, off-the-shelf items doesn’t establish that a vendor can produce a custom seal to your specifications. The terms for a custom purchase order, including minimum order quantity and tooling charges, may differ from standard items. Are tools and dies controlled by the vendor? Are tools and dies controlled by the buyer? Is the purchased item approved for use (by the Buyer)? Are repeat items purchased to the previously approved drawing revision?

Consider the actual demand of your plant when negotiating purchase orders. What lead-time can the supplier commit? Under what conditions will the supplier guarantee delivery? Obtain sample approval and reorder terms from the vendor.

7. Compare cost per accepted joint

What’s the unit of measurement (e.g. bags, boxes) and price for seals? Are FOB terms included? What’s the tooling cost? What’s the closure cost? What’s the labor cost? What’s the remake/rejection rate?

The least expensive seal may require more sealing time, or produce an inconsistent joint. An expensive closure may not be justifiable if it provides no benefit for a given application. The cost to produce an accepted joint should be compared under the same working conditions. This article won’t attempt to set a price range, as several other variables, such as quantity required and the end-use location, will also affect the price.

8. Check whether a separate seal is needed

Some processing methods for PET and PP use friction welding, and some steel processes use sealless joining tools. If an approved method of joining eliminates the need for a seal, purchasing a seal adds an unused process consumable. Make sure you understand the tools and package requirements, and assess the offerings of strap closure manufacturers.

Other changes affected by the method of joint are tool service, package validation and operator steps. Consider the complete application when trying to upgrade tools for heavy-duty applications. Edge protectors and stretch wrap contribute to secure packaging; a suitable strap joint is still required. Refer to the guide for assessment of package testing to understand package testing and new strap components.

Frequently Asked Questions

Who is the best strapping seal manufacturer?

Choose by the joint system and purchasing need

The best strapping seal manufacturer depends on strap material, width, thickness, joint design, sealer model, load requirements and purchasing volume. Signode is a useful starting point for its named tool families, while specialist producers may offer a closer fit for a custom profile, small direct order or private-label carton. Use the comparison to form a shortlist, then compare the proposed products against the same drawing and sample-joint acceptance criteria before approving a repeat supply arrangement.

Which seal should I use for PET strapping?

Match the PET strap, closure and tool

The correct PET strapping seal depends on the strap dimensions, surface, joining method and tool used to form the joint. A product described as a polyester strapping seal can still have a specific width, gauge and jaw requirement. Serrated designs are used in some mechanical systems, while friction-welded PET joints use no separate seal. Start with the strap specification and tool model, then obtain the manufacturer’s matching seal code and a sample result for that combination.

What is the difference between a strapping seal and a buckle?

They secure the strap in different ways

A strapping seal is typically formed or crimped around the strap with a tool, while a buckle generally locks the strap through a threaded or looped arrangement. The distinction matters when ordering consumables: two closures with the same nominal width may require different tensioning and joining procedures. A supplier that manufactures wire buckles isn’t necessarily a strapping-seal producer. Identify the existing closure and its application method before using a catalogue’s general fastening category to select a replacement.

Is a strapping seal the same as a sealer?

The seal is consumed; the sealer applies it

The seal is the consumable closure; the sealer is the tool used to form or close that seal. An order should identify both separately, including the required jaw or die. Buying a compatible-width seal doesn’t establish compatibility with every sealer of that width.

Can the same seal be used for steel, PET and PP strapping?

Check the stated material and tool combination

Not automatically; seal compatibility depends on material, strap dimensions, surface and the joining tool. Some producers list combined PP/PET products, but that doesn’t extend to every plastic strap or steel joint. Use the selected product’s specification and test the proposed combination.

How much do strapping seals cost?

Compare like-for-like specifications and quantities

Strapping-seal prices vary with material, dimensions, profile, coating, quantity, packaging, tooling requirements and destination. Compare delivered offers using the same seal specification and piece count. Include application labour and rejected joints when judging value; a price per bag alone is an incomplete comparison.

Match Your Strap and Buckle or Seal with UD Packaging

Compare the seal range of various manufacturers and assess if the joints fulfill the requirement. The best strapping seals and tools are those which are in consonance with the requirements of the package. When requesting samples or quotes, state your requirements along with those of the package.

UD Packaging, a strapping seals supplier, manufactures PET strapping and supplies related buckles for the packaging industry. For strapping seals for your specific packaging needs, state the strap material, width, thickness and surface, the tool model, the joint to be replaced, and the intended application. State the expected order volume, destination, and other pertinent information to enable UD Packaging to evaluate your requirements.

UD Packaging appreciates your inquiry.

For strap and closure requirements, discuss your application with UD Packaging. The team can assess the application and the seal options provided, and review the PET strap. They won’t present UD as an in-house seal manufacturer when reviewing the application.

References & Sources

Specific information has been retrieved from company product, factory and history pages, plus public company records. Public company records support the qualified incorporation and address information. Manufacturer-stated capacities and quality systems are attributed to the company. They won’t be performance ratings.

• ASTM D3953-15(2022): Standard Specification for Strapping, Flat Steel and Seals.
• ASTM D3950-23: Standard Specification for Strapping, Nonmetallic (and Joining Methods).
• ASTM D4675-14a(2022): Standard Guide for Selection and Use of Flat Strapping Materials.

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